Wireless, so you are free to move around during your presentationsEasy to use buttons provide perfect control of your presentation slideshowThe practical laser pointer allows you to highlight any part of your presentation, even in the darkest roomsPlug & Play: just plug it in and you are ready to go Interface: USBLaser class: Class 2, EN 60825-1-2014Max Output: Less than 1 mWWave Length: 640~660 nm (red light)Wireless technology: RF 2.4 GHzPresenter control distance: up to 10 m (depending on environment)Power supply: 1 x AAA battery (not Included)Dimensions: 105 x 38 x 25 mmNet weight: 64 gWindows 7/8/10Free USB port for the receiverSafety Precautions:Avoid possible eye damage! Natural blink reflex may not be suppressedDo not look directly into the laser beamDo not point toward faces of other people (or animals)Never point the presenter’s laser beam at a mirror or other highly-reflective surfacesDo not use laser in combination with optical instruments such as lenses, microscopes or binocularsAny attempt to disassemble, adjust or repair the presenter may result in exposure to laser light or other safety hazards. Do not use the device when it is damaged or defect.Keep the presenter away from children. This is not a toy.